n. 1 The result of enlarging a digital image further than the resolution of the monitor device, usually 72 dpi (dots per inch), causing the individual pixels making up the image to become more prominent, thus causing a grainy appearance in the image. 2 Blurring a part of a picture by grouping pixel areas.
Pixelization ( British English, pixelisation) is any technique used in editing images or video, whereby an image is blurred by displaying part or all of it at a markedly lower resolution. It is primarily used for censorship. The effect is a standard graphics filter, available in all but the most basic bitmap graphics editors.